How do I create a main menu for a text-based rpg written in C++?

I have to build the framework for this project for a class. The first requirement is to develop a main menu for your game. This menu should display a title followed by three menu choices:
1)StartNewGame, 2)LoadGame and 3)Quit. If the user selects to start a new game, the program should proceed as described in the next paragraph. If the user selects to load a game, a message should be printed on the screen letting the user know the feature is not yet implemented. If the user selects to quite a game the program should exit. Each of these options should be selectable by pressing the number that corresponds, i.e. 1, 2, or 3. How do I go about doing this?